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CN-122011935-A - Gold-copper alloy wear-resistant antibacterial composite coating, and preparation method and application thereof

CN122011935ACN 122011935 ACN122011935 ACN 122011935ACN-122011935-A

Abstract

The application discloses a gold-copper alloy anti-wear antibacterial composite coating, a preparation method and application thereof, and the gold-copper alloy anti-wear antibacterial composite coating comprises a bottom layer and an anti-wear antibacterial modified layer, wherein the bottom layer comprises chromium and chromium nitride, the anti-wear antibacterial modified layer comprises an anti-wear antibacterial modifier and polysiloxane modified acrylic resin, the anti-wear antibacterial modifier comprises the following raw materials, by mass, 30-50 parts of zinc doped mesoporous silica nanospheres, 5-10 parts of hydroxyethyl methacrylate phosphate, 1-5 parts of nano cerium oxide, 1-3 parts of carboxylated graphene oxide, 1-5 parts of polyacrylic dispersing agents, 3-5 parts of polyether modified polysiloxane leveling agents, 2-6 parts of polymer defoamers and 1-3 parts of photoinitiators, and the composite coating has excellent wear resistance and antibacterial performance.

Inventors

  • TANG YI

Assignees

  • 北京国道黄金有限公司

Dates

Publication Date
20260512
Application Date
20260108

Claims (9)

  1. 1. The wear-resistant and antibacterial composite coating of the gold-copper alloy is characterized by comprising a bottom layer and a wear-resistant and antibacterial modified layer, wherein the bottom layer comprises chromium and chromium nitride, The wear-resistant antibacterial modified layer comprises a wear-resistant antibacterial modifier and polysiloxane modified acrylic resin, The wear-resistant antibacterial modifier comprises the following raw material components in parts by mass: 30-50 parts of zinc doped mesoporous silica nanospheres, 5-10 Parts of hydroxyethyl methacrylate phosphate, 1-5 Parts of nano cerium oxide, 1-3 Parts of carboxylated graphene oxide, 1-5 Parts of polyacrylic acid dispersing agent, 3-5 Parts of polyether modified polysiloxane flatting agent, 2-6 Parts of polymer defoamer, 1-3 Parts of photoinitiator.
  2. 2. The gold-copper alloy wear-resistant antibacterial composite coating according to claim 1, wherein the nano cerium oxide is modified by an epoxy silane coupling agent.
  3. 3. The gold-copper alloy wear-resistant and antibacterial composite coating according to claim 1, wherein the photoinitiator is 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide.
  4. 4. A method for preparing the gold-copper alloy wear-resistant antibacterial composite coating as claimed in any one of claims 1 to 3, which is characterized by comprising the following steps: s1, preprocessing a substrate, namely degreasing the substrate to obtain a preprocessed substrate; s2, preparing a bottom layer, namely depositing chromium and chromium nitride on the surface of the substrate by adopting a low-temperature PVD magnetron sputtering process to obtain the bottom layer; S3, preparing the wear-resistant antibacterial modified layer, namely mixing the wear-resistant antibacterial modifier with polysiloxane modified acrylic resin, coating the mixture on the surface of the bottom layer, and curing the mixture to obtain the wear-resistant antibacterial modified layer.
  5. 5. The method for preparing the gold-copper alloy wear-resistant antibacterial composite coating according to claim 4, wherein the step S1 is performed with argon and oxygen mixed plasma treatment after the substrate is deoiled.
  6. 6. The method for preparing the gold-copper alloy wear-resistant antibacterial composite coating according to claim 4, wherein the deposition sequence in the step S1 is chromium and chromium nitride in sequence.
  7. 7. The method for preparing the gold-copper alloy wear-resistant antibacterial composite coating according to claim 4, wherein the mass ratio of the wear-resistant antibacterial modifier to the polysiloxane-modified acrylic resin is (1-2) 10.
  8. 8. The method for preparing the gold-copper alloy wear-resistant antibacterial composite coating according to claim 4, wherein the thickness of the bottom layer is 1-5 μm, and the thickness of the wear-resistant antibacterial modified layer is 10-15 μm.
  9. 9. Use of the gold-copper alloy wear-resistant antimicrobial composite coating according to any one of claims 1-3.

Description

Gold-copper alloy wear-resistant antibacterial composite coating, and preparation method and application thereof Technical Field The application relates to the technical field of gold-copper alloy surface protection, in particular to a gold-copper alloy wear-resistant antibacterial composite coating, a preparation method and application thereof. Background Gold-copper alloy is an ideal material for portable decoration components due to its unique metal characteristics. In the conventional metal surface treatment technology, gold-copper alloy is often used for enhancing the surface performance by electroplating, heat treatment or physical vapor deposition. The electroplating process improves the corrosion resistance and the wear resistance of the alloy by depositing a metal or alloy coating on the surface of the alloy, optimizes the internal organization structure of the alloy by controlling the heating and cooling processes in heat treatment to enhance the hardness and the wear resistance, and forms a compact and uniform coating on the surface of the alloy by using the physical process in a vacuum environment in a physical vapor deposition technology to further enhance the wear resistance. These technical paths are all developed around improving the wear resistance of the gold-copper alloy, and the service life of the decorative member is prolonged by changing the surface microstructure or adding a protective layer. Although the technology has remarkable effect on the aspect of improving the wear resistance, the wear resistance is difficult to be ensured, meanwhile, the lasting antibacterial effect is difficult to realize, the functional requirements of the antibacterial coating and the wear-resistant coating are conflicting, the antibacterial coating needs to be exposed with active antibacterial components to play a role, but in the wear-resistant strengthening treatment process, the coating is easily damaged due to mechanical wear or surface flattening treatment, so that the antibacterial performance is attenuated, and the wear-resistant strengthening treatment is used for reducing the surface roughness and improving the hardness, so that the microscopic concave-convex structure of the surface is often reduced, the adhesion sites of the antibacterial agent are weakened, and the loading capacity and the stability of the antibacterial agent are reduced. Disclosure of Invention In order to solve the technical problem that the wear resistance and the antibacterial property are difficult to realize, the anti-wear antibacterial composite coating of the gold-copper alloy, and the preparation method and the application thereof are provided. The first object of the present invention is achieved by the following technical solutions: the wear-resistant and antibacterial composite coating comprises a bottom layer and a wear-resistant and antibacterial modified layer, wherein the bottom layer comprises chromium and chromium nitride, The wear-resistant antibacterial modified layer comprises a wear-resistant antibacterial modifier and polysiloxane modified acrylic resin, The wear-resistant antibacterial modifier comprises the following raw material components in parts by mass: 30-50 parts of zinc doped mesoporous silica nanospheres, 5-10 Parts of hydroxyethyl methacrylate phosphate, 1-5 Parts of nano cerium oxide, 1-3 Parts of carboxylated graphene oxide, 1-5 Parts of polyacrylic acid dispersing agent, 3-5 Parts of polyether modified polysiloxane flatting agent, 2-6 Parts of polymer defoamer, 1-3 Parts of photoinitiator. By adopting the technical scheme, the bottom layer is composed of chromium and chromium nitride, and a dense film with strong binding force with the metal matrix strengthens the plastic deformation resistance of the matrix, provides wear resistance and can also effectively block permeation of external corrosive media; the wear-resistant antibacterial modified layer endows the coating with wear-resistant and antibacterial properties through a wear-resistant antibacterial modifier and polysiloxane modified acrylic resin, and the polysiloxane modified acrylic resin combines the curability of the acrylic chain segment and the flexibility and low surface energy of the polysiloxane chain segment to form a crosslinked network and endow the coating with good toughness and surface smoothness, so that a continuous phase is provided for the dispersion of functional fillers; The mesoporous structure of the zinc-doped mesoporous silica nanosphere has high specific surface area and pore volume, zinc ions can be loaded, antibacterial ions can be released for a long time through a slow release mechanism, the zinc ions can interfere bacterial metabolism, meanwhile, the silica nanosphere is a rigid particle and is used as a hard reinforcing phase, the expansion of microcracks in the friction process can be effectively prevented, and the abrasion resistance of a coating is improved; Hydroxyethyl methacrylate phosphate is